Multiple Choice
The 1-cm-thick clay layer that marks the Cretaceous/Tertiary (K/T) boundary has a high percentage of the element ________ in the clay layer,an enrichment about 300 times greater than the normal abundance.
A) iridium
B) silicon
C) iron
D) oxygen
E) zircon
Correct Answer:
Verified
Correct Answer:
Verified
Related Questions
Q22: Evidence demonstrating that the crater in Arizona
Q23: Statistically,your risk of being killed by a
Q24: The world's classic meteorite crater lies on
Q25: The solar system is surrounded by the
Q26: Halley's comet has an average orbital period
Q28: The nearer an icy comet approaches the
Q29: Space debris that collides with the Earth
Q30: The biggest known impact on Earth in
Q31: As a comet curves around the Sun,its
Q32: The major types of meteorites are either